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1976 U.S. agricultural outlook : papers pres. at the National Agricultural Outlook Conference, sponsored by the U.S. Department of Agriculture ; held in Washington/D. C., 17.-20.11.1975
(1975)
Changing geographic location of agricultural production
Barton, Glen T., (19XX)
Persistence pays : U.S. agricultural productivity growth and the benefits from public R&D spending
Alston, Julian Mark, (2010)